DOM Digital Orthophoto Map

Specifications

Digital Orthophoto Map (DOM) refers to image data generated by using a Digital Elevation Model (DEM) to perform pixel-by-pixel rectification on scanned and digitized aerial photographs or remote sensing images (monochrome/color), followed by image mosaicking and cropping according to map sheet boundaries. It is typically a planimetric map featuring kilometer grid lines, inner and outer map marginalia, and annotations.

For aerial photographs, a digital photogrammetry system can be used to reconstruct the aerial exposure attitude, establish stereo models, and inspect, edit, and generate DEMs within the system, thereby producing high-precision DOMs. For satellite imagery, existing DEM data can be utilized to generate DOMs through single-image digital differential rectification. Rich in information and visually intuitive, DOMs offer excellent interpretability and measurability. They can serve as background control information to evaluate the accuracy, currency, and completeness of other datasets, extract natural resource and socio-economic development information, and provide a reliable basis for disaster prevention and public infrastructure planning. Furthermore, new information can be extracted and derived to facilitate map revision and updating. In urban surveying and mapping, DOMs are widely applied in urban planning and design, transportation planning, urban green coverage surveys, urban built-up area development assessments, scenic area planning, urban development and ecological environment surveys, and sustainable development research, delivering significant social and economic benefits.